RNA binding protein DDX5 restricts RORγt + T reg suppressor function to promote intestine inflammation.
Shengyun MaQiyuan YangNicholas ChenAnna ZhengNazia AbbasiGaowei WangParth R PatelBenjamin S ChoBrian A YeeLunfeng ZhangHiutung ChuSylvia M EvansGene W YeoYe ZhengWendy Jia Men HuangPublished in: Science advances (2023)
Retinoid-related orphan receptor (RAR) gamma (RORγt)-expressing regulatory T cells (RORγt + T regs ) play pivotal roles in preventing T cell hyperactivation and maintaining tissue homeostasis, in part by secreting the anti-inflammation cytokine interleukin-10 (IL-10). Here, we report that hypoxia-induced factor 1α (HIF1α) is the master transcription factor for Il10 in RORγt + T regs . This critical anti-inflammatory pathway is negatively regulated by an RNA binding protein DEAD box helicase 5 (DDX5). As a transcriptional corepressor, DDX5 restricts the expression of HIF1α and its downstream target gene Il10 in RORγt + T regs . T cell-specific Ddx5 knockout (DDX5 ΔT ) mice have augmented RORγt + T reg suppressor activities and are better protected from intestinal inflammation. Genetic ablation or pharmacologic inhibition of HIF1α restores enteropathy susceptibility in DDX5 ΔT mice. The DDX5-HIF1α-IL-10 pathway is conserved in mice and humans. These findings reveal potential therapeutic targets for intestinal inflammatory diseases.
Keyphrases
- binding protein
- transcription factor
- regulatory t cells
- oxidative stress
- high fat diet induced
- genome wide
- endothelial cells
- anti inflammatory
- wild type
- gene expression
- poor prognosis
- dendritic cells
- dna methylation
- immune response
- insulin resistance
- adipose tissue
- metabolic syndrome
- skeletal muscle
- nucleic acid
- dna binding
- long non coding rna
- virtual reality